diff --git a/local_plugins/agent_service/ios/agent_service/Sources/agent_service/AgentServiceImpl.swift b/local_plugins/agent_service/ios/agent_service/Sources/agent_service/AgentServiceImpl.swift
index b861e6d1d..bd9a17a1e 100644
--- a/local_plugins/agent_service/ios/agent_service/Sources/agent_service/AgentServiceImpl.swift
+++ b/local_plugins/agent_service/ios/agent_service/Sources/agent_service/AgentServiceImpl.swift
@@ -386,40 +386,29 @@ class AgentServiceImpl: NSObject {
     }
 
     private func startIdleCheck(idleSeconds: TimeInterval = 10) {
-        // 2. 所有对idleTimer的操作都通过串行队列执行，避免竞态条件
         timerQueue.async {
-            // 先停止旧的定时器（在串行队列中执行，确保线程安全）
-            self.stopIdleCheck()
-            
+            if self.idleTimer != nil {
+                self.idleTimer?.cancel()
+                self.idleTimer = nil
+            }
             guard self.isRecognizing else { return }
-            
             os_log("启动空闲检测，超时时间: %.0f秒，模式: %{public}@",
                    log: self.logger,
                    type: .info,
                    idleSeconds,
                    self.currentRecognitionMode)
-            
-            // 使用全局队列作为定时器回调队列（避免后台挂起）
             let timer = DispatchSource.makeTimerSource(queue: DispatchQueue.global(qos: .utility))
-            
             timer.schedule(deadline: .now() + idleSeconds)
             timer.setEventHandler { [weak self] in
                 guard let self = self else { return }
-                
-                // 回调在全局队列，涉及UI或实例变量操作时切换到主线程
                 DispatchQueue.main.async { [weak self] in
                     guard let self = self else { return }
-                    
-                    // 检查状态（确保在主线程访问这些属性，避免UI相关竞态）
+                    os_log("空闲检测触发自动停止，模式: %{public}@",
+                           log: self.logger,
+                           type: .info,
+                           self.currentRecognitionMode)
                     if self.isRecognizing && !self.isSpeaking && !self.isAiStreaming {
-                        os_log("空闲检测触发自动停止，模式: %{public}@",
-                               log: self.logger,
-                               type: .info,
-                               self.currentRecognitionMode)
-                        
-                        // 关闭编码器（设备侧操作，若BleService线程安全可直接调用，否则需加锁）
                         BleService.shared.closeCodec()
-                        
                         self.stopRecognition()
                         self.sendEvent(name: "auto_stop", data: [
                             "reason": "idle_timeout",
@@ -429,9 +418,7 @@ class AgentServiceImpl: NSObject {
                     }
                 }
             }
-            
             timer.resume()
-            // 3. 在串行队列中安全赋值
             self.idleTimer = timer
         }
     }